Friday, November 28, 2014
How I'm voting tomorrow
Thursday, October 23, 2014
The Cloud and I
Why my enthusiasm about the cloud?
I used to be such a doubter. I thought it was all just was just marketing hype.
Then a few years ago the company I then worked for placed me as a consultant in the roll of technical team lead on a project developing a new website for a University.
The team and I had a hard deadline of two months to deliver the new site, on a new CMS, with new content and a new look, on new hardware.
The first thing I did was calculate the number of servers that the team and I would need for the project.
I picked up the phone to the university's IT services department.
“Could I have 7 servers to go please?”
The voice on the other side cackled: “You're new here, aren't you? Go to our website, download the application form, fill it in in triplicate, mail the copies to the acquisitions committee, who will then either approve or decline your request. If approved, the request goes out to tender, the successful bidder is selected and an order placed. Eventually you will get your servers.”
“How long does this take” I asked, feeling faint.
“The committee sits once a month, and they've just sat, so you'll have to wait a month, and then ordinarily it takes at least 4 weeks for the hardware if the purchase is approved. So for you, at least 8 weeks”
I hung up and buried my head in my hands. We were totally screwed. There was no way that we could make our deadline!
Then the Universities development lead said “I know a site that will host our source code and defect tracking system for a few dollars a month. Someone lend me a credit card”.
Inspired by his example I thought “Amazon!”
I phoned my companies hardware and network guru to talk it through.
“Don't worry about Amazon - I've got a big server lying spare” he said. “I'll set up some virtual servers for your team on it. How many do you want?”
30 minutes and $10 later we had all the hardware and software we needed and by the end of the day we were already committing code and accepting defect reports.
In a blink of an eye the politics, processes and policies of the University had been totally upended.
When physical servers eventually arrived their cost was in the order of about $20 000. And they arrived well before the end of the project, because we threatened to go live on our virtual servers, thus demonstrating that the IT services department wasn't really needed...
That project showed me that despite my doubts, cloud computing is a game changer. Everybody in IT, no matter what their role needs to understand this.
Tuesday, August 27, 2013
Australia's got talent?
- If anyone is going to have to pass a test showing their ability at hiring time, then I would very much like it to be, say the brain surgeon who may be about to operate on me. Strangely enough, the medical profession doesn't seem to work this way. Why is that?
- Are we actually moving to a world where some newly graduated developers are not going to find work in the industry because they aren't “talented” enough? My second canary seems to indicate that this may indeed be the case.
- Is this the hoary old chestnut about developer productivity raising its head again?
- Why don't we regularly test existing employees? If recruitment tests are actually useful in determining “talent”, then it would be good to regularly check to see if our internal processes are helping our talented developers to further their acquisition of that deep domain knowledge?
- How many companies regularly review their recruitment process and measure its effectiveness?
Go figure.
Friday, August 16, 2013
A click is not enough
In the Maldives a 15 year old girl has been sentenced to 8 months of house arrest and 100 lashes from a whip. Her crime? She confessed to having been raped. This is, to our western sensibilities, clearly outrageous. A travesty of justice.
Sunday, July 28, 2013
Some thoughts now that I'm an Australian.
- Peacefulness
- Respect for the dignity of the individual
- Freedom of speech and association
- Equality before the law
- Equality of opportunity
Monday, June 03, 2013
Spatialite and Me
For what it's worth (and because this should be documented somewhere, for those who follow) I believe that the following are the steps required to get Spatialite up and running in python on Ubuntu 13.04 (Raring Ringtail) and Ubuntu 12.04. I say 'I believe' because I haven't worked with this in any anger yet :(
Thoughts
If you bother to read through the following then you'll see that my problems were largely caused by the PyPi version of pyspatialite. I think that this software is fundamentally broken in several ways:it assumes a layout and content of the Spatialite site it references, it does not notify the user clearly when those assumptions are broken, and it caches files and does not remove them if an error was encountered.
The net effect is that every time the Spatialite site is changed (what, no stable url's?) the PyPi download is likely to break and will need repair. And innocent users such as myself will waste a lot of time trying to work out what went wrong.
So if installing on Ubuntu simply use:
sudo apt-get install python-pyspatialite
The downside is that this package is only supported on Quantal and Raring Ringtail.
If you need some sort of automated deployment then clearly you are going to do a lot of work if you want to deploy to anything other than Quantal and Ringtail...
Ubuntu 13.04
I started out on Ubuntu 13.04 and decided that I would try to do some sort of self contained install so that I could make use of virtualenv.Do not do what I did:
pip install pyspatialite
For if you do you will be met with:
download_file = pattern.findall(download_page)[0]
IndexError: list index out of range
This is because it would appear that the installer is trying to fetch a file from the Internet: a file that does not exist. From my search on the Internet, this seems to be a regular occurrence with the different versions this software, and may be fixed only to reoccur on the next release :(
If you have the misfortune of making this mistake be aware that the installer has already downloaded files, and it will not try to get replacement copies without manual intervention. More on this in the section on installing on Ubuntu 12.04 below. For I think with a little bit of hacking you could fix this.
Be warned: if you get this error and then attempt to install an older version, you will be met with:
error: conflicting types for ‘spatialite_init’
Do not try to clear ~/.pip/cache – because that's not where the files are being cached :( A pip un-install will not work either, as the software was never installed :(
Having run into the above I simply switched to a new VM, discarding my 'broken' one, and in the new VM I ran:
pip install pyspatialite==2.6.2-spatialite.2.4.0-4
But don't you do this yet: first you need to run:
apt-get install python-dev
Or you will get the following error:
fatal error: Python.h: No such file or directory
Wait: don't run that initial install yet! You also need to run:
apt-get install libgoes-dev
Otherwise you will get:
error: geos_c.h: No such file or directory
And be still that twitching finger: Next you need to run:
apt-get install libproj-dev
Otherwise you will get:
error: proj_api.h: No such file or directory
Then still hold off: for next you need to do:
apt-get install libsqlite3-dev
For if you don't you will be met by a:
fatal error: sqlite3.h: No such file or directory
Then (yes, there's more) you need to
cd /usr/lib
sudo ln -s libgeos-3.3.3.so libgeos.so
For if you don't, you will be met by the somewhat mysterious:
/usr/bin/ld: cannot find -lgeos
This last one is happening because the libgeos-3.3.3 package installed with libgeos-dev forgets to create create this needed symlink (!) It used to, I know, because the Internet tells me so.
Then, finally, don't forget to do a:
apt-get install libspatialite-dev
Otherwise you might be met with a:
fatal error: spatialite.h: No such file or directory
Finally, finally you can run:
pip install pyspatialite==2.6.2-spatialite.2.4.0-4
Don't forget to use sudo if not running as root in all of the above…
Having got to this stage, you can then open up a python shell and try to connect to the database. I say 'try' because you are not yet done!
You need to:
gedit /usr/local/lib/python2.7/dis-packages/pyspatialite/dbapi2.py
And change line 50 to be:
version_info = tuple([int(x) if is instance(x, (int, long)) else x for x in version.split(".")])
This is because the version_info contains strings as well as integers, and the original, as written, thus dies at this point:
version_info = tuple([int(x) for x in version.split(".")])
This last step fills me with dread, as who knows how this string is actually used? How might this step bite later on? However, after all of the above, I could now open the two Sqlite databases I have with Spatialite data in python and execute queries against them.
As you can gather, I made each of the mistakes above, and had to resolve where I had gone wrong: a time consuming task. And one that has had me muttering dark words and wondering nasty thoughts about Spatialite.
The alternate process is to simply accept machine wide installation and to do the following:
sudo apt-get install python-pyspatialite
Which gave me my python bindings on more up to date versions of the software without any of the pain I went through doing the pip install.
However, having done all of this I discovered that I actually needed to run Spatialite version 3 on Ubuntu 12.04. So, getting the whole shebang set up on 12.04 became my next task.
Ubuntu 12.04
On 12.04, having been trained by my previous experiences, I simply ran:sudo apt-get install python-dev
sudo apt-get install libgeos-dev
sudo apt-get install libproj-dev
Then I downloaded pyspatialite 3.0.1 from:
https://pypi.python.org/pypi/pyspatialite/3.0.1
and unpacked it into a directory off of my home directory.
Then I moved to this directory and ran
sudo python setup install
Which crashed and burned with the infamous error message:
download_file = pattern.findall(download_page)[0]
IndexError: list index out of range
I went to the line causing the error (line 97)
and replaced the "pattern.findall(download_page)[0]" with "libspatialite-amalgamation-3.0.1.zip" (the version of the file I wanted to install) I also edited the url in the following line to read: "http://www.gaia-gis.it/gaia-sins/libspatialite-sources/", because as it stood it was not a correct url.
I reran
sudo python setup install
and got the dreaded
error: conflicting types for ‘spatialite_init’
I simply deleted the amalgamation subdirectory into which the installer seems to download stuff into and reran:
sudo python setup install
And this time, it all seemed to work. Sweetness and light, and the trilling of angels ensued. More importantly, I was able to open and access the databases I wanted to work with.
It really shouldn't be this hard, should it? Also knowing all of this, I suspect I could get the pip install that I tried on 13.04 working. But life is too short.
Tuesday, December 18, 2012
An Introduction to OpenStack
Earlier this month I gave a talk to the December meeting of the LUV, introducing the members of the group to OpenStack.
Unaccustomed as I am to public speaking, I wrote the whole lot out before I prepared the slides.
Which turned out to be a good thing, as we couldn't get the overhead projector to show the slides...
Luckily I had prepared some hand outs, and was able to wing the talk based on the handouts. This is the copy of the talk I prepared before creating the slides. An Introduction to OpenStack
I thoroughly enjoyed both giving the talk and answering the subsequent questions. LUV seems to be a group populated by people both smart and friendly!
Sunday, February 19, 2012
Shot!
“You!” a man popped through the crowd, shouting, angry, pointing at me: “You! You're the person who's sleeping with my wife!”
Then the insanity hit. If there was nothing but my consciousness, then I could create things. Like hands. I don't know why, but I fixated on hands. I worked really hard on feeling what it would be like to have hands – and I had hands!
But there was a sheet over my body? Why?
I rationalised, yet again. When I fell, I must have hit my head and suffered brain damage. Now, many months later, I had come to, my wounds healed. But my ability to see had been destroyed by the brain damage!
I felt above my head. And there is was, hanging from a cord!
Saturday, November 05, 2011
The mice are driving the experiment
My next speech on. For this one I thought I'd try to give the audience a window into the wild and wacky world of software development, as I see it. And the view isn't that good...
A twig. It all started with a twig. Someone, a long time ago, prodded something, and noticed that it moved. Ever since then we have been poking away at things, and developing increasingly complex machines based on the results of our prodding. That jumbo jet that flies above can be seen as the apex of this twig technology.[1]
But our world is changing.
Through the wonder of integrated circuits we are now building machines out of the dancing of electrons. There are no moving parts in these machines. We are entering a new age – the silicon age.
Software development stands at the very forefront of this new age.
But if we truly look at the world of software development I fear that it shows we are not doing very well in this new post twig era. There are many issues, but I believe that there are two primary issues causing most of the problems.
But to explain, first you have to understand software.
Software can be seen as machines of the mind. Machines that have been created from words. Small sets of words written down to form tiny languages. With those small languages we instruct the electrons, building at first simple machines. As these tiny languages have such limited vocabularies, we communicate the ideas behind our machines of the mind with others through abstractions and metaphors.
Then we iterate, adding new words to our existing languages, developing new languages, wrapping existing machines to extend their capabilities, building new machines, and so on. We build on our past successes, learning from our mistakes... Of course, with the new languages and new machines come new abstractions and metaphors.
And so the circle of software development goes.
The speed at which we software developers extend and change our machines, languages, abstractions and metaphors mean that half of what a software developer knows today will be obsolete in three years time. This then, is the first issue: the need for continuous learning.[2]
Very few software companies have learning at their heart. So much so that Starbucks will spend more on training a barrista than the typical software company will spend on training a developer. [3] Software companies thus expect their employees to keep abreast of the rapidly changing world through after hours study, or they rely on new hires to bring in the new knowledge they require.
This makes the industry ageist.
Think about it. The more time you spend working on a current language or platform, the less time you have to study and learn the ones that will replace what you currently know. Especially if you have a family.
So the industry is also set against people with normal family lives.
Which makes the industry inherently sexist.
Any women who take time out to have children will find that the longer they leave their return to the industry the more out of touch they will be – and thus less likely to find work.
Google is one of the few companies that I know of that have developed a strategy to help their employees learn: they allow developers 20% of their paid time to work on things that aren't in their job descriptions. To try new things out, to experiment, to learn.[4]
When I tried to discuss Google's approach with the head of software development at a local company he was outraged – exploding in white hot anger at the thought that his developers would spend one day a week not “working”.
The next issue is subtly related.
People have ideas, and those ideas are turned into theories. But in software, those theories are mostly never tested. If accepted, they simply become dogma, a truth that all are expected to follow, unquestioningly. Those who don't follow are ostracized and ridiculed.
As an example there is a deep seated belief that there is at least a 10 times difference between the productivity of 'good' and 'bad' developers. But the truth is that there are no really valid metrics to measure programmer productivity. People can't even agree on what makes a good or a bad developer. So if developer productivity can't be measured, how can the belief have any basis?
We need look no further than the job adverts for software developers to see these two problems exposed: Employers choose to drill down on technology skills, riddling job adverts with acronyms, seeking years of experience in specific languages, platforms and tools[5] . The industry is looking for people it doesn't have to train - and applicants have to prove that they don't need the training. Nowadays even people with PhD's can expect to be asked to write a test to prove their competence when they apply for a post.
But here in Australia, for every hundred resume's received by a software company, only one person will be hired. In the United States that figure was two in a hundred.
This is in an industry that claims that that there is a shortage of developers.
Only one in a hundred applicants are accepted.
Isn't this really symptomatic of an industry that is picky beyond belief, doing its level best to only hire the “good” developers that require no further training?
I believe that these two issues expose us as the illogical beings that we really are. Struggling with unfounded beliefs and not able to deal with an the need for continuous learning in our workplaces.
Software development is the experimental frontier of the post twig era. In that experimental frontier I believe that that the mice are driving the experiment.
Footnotes
[1] Douglas Adams was the person who I first heard make this observation. Read the book: it is recommended!
[2] Can anyone say "Innovator's Dilemma"? Perhaps one of the reasons companies claim to look for people who go to user groups and write open source software is that subconsciously we recognize that passion does trump rational decision making?
[3] I believe that McDonald's might also spend more on training their burger flippers than a typical software company will spend on training its developers.
[4] Atlassian also do this: I think that their business focused way of directing this might be a a better way than Google's.
[5] Yes: the more acronyms, years and jargon I see in your job advert, the less I expect that you spend on training your developers. The best job advert for developers I have seen simply read "Wanted: Scala developer". I applied, but didn't make the cut as I was deemed "not to be a good fit for the company culture". I understood that to mean that I would be the only developer on the team with a wife and kids - I was too old :-(
Sunday, August 21, 2011
Beware what lies in the sand beneath
Beware what lies in the sand beneath
There is a parasite that lives amongst us.
A parasite so small that when eaten by you, it will make its way through your gut wall, and then, using your bloodstream as a vehicle it moves to the sites in your body which it will call home.
These sites being your muscles and your brain.
Once the parasite has arrived at its future home it forms cysts inside your cells, hiding in the cysts, safe from your immune system.
It is a parasite that most of us aren't aware of.
Which is odd – because at least one in five of us are infected.
That's just the humans – a whole range of other animals are also subject to attack by this parasite. From mice and rats through to humans.
Not only is it a common parasite – but once infected it is very difficult to clear the infection.
The name of the parasite I am talking about tonight is Toxoplasma Gondii
Until recently it wasn't considered a bad infection to have.
Then it was noticed that toxoplasmosis alters the behaviour of infected rats.
Infected rats started to behave in very un-rat like ways.
They begin to hang out in areas where there are cats – even at times trying to go one on one against the cats, trying to show those cats exactly who is the boss.
Which is not a very bright thing to do, because, well, cats eat rats.
So infected rats, despite their bravery, generally don't have happy endings.
But here's the thought provoking thing: Toxoplasmosis can only breed in the small intestine of a cat.
So it needs to be ingested by a cat to breed. It is critical for the survival of the parasite that it find its way to a cat's gut.
How convenient then, from the parasites point of view, that a rat infected with Toxoplasmosis would change it's behaviour in such a way as to make it more prone to be eaten by cats.
Scientists believe that convenience plays no role in this. Rather, they believe that Toxoplasmosis cruelly and deliberately plays with the brain of its rat hosts to make them go out and get eaten by cats.
Singapore zoo has a its tigers separated from us human viewers by large plate glass windows. From some angles it looks as though nothing separates you from the tigers.
I don't know about you, but in those moments, when it just me and the tiger, my stomach always instinctively tightens in an apprehensive knot.
It is almost as though my subconscious recognises that a few thousand years back, when men were far more puny, and tigers, lion, and other large cats were far more plentiful, that, well, we were the prey.
Let us all do some basic scientific research in the form of a little thought experiment.
Could it be possible that us humans are also susceptible to behavioural changes driven by something so much smaller than one of our cells?
Also, if there are behavioural changes, just what might they be?
Scientists were also intrigued by this line of thought.
Having a fairly large infected population to sample, they found it fairly easy to design experiments and tests that would reveal changes.
Interestingly they found that the changes were gender related
Infected men are far more likely to disregard rules and are more expedient, suspicious, jealous, and dogmatic.
Infected women are more beautiful, warm hearted, outgoing and persistent.
Common to both are impaired motor skills, and slower reactions
So much so that people with toxoplasmosis are six times more likely to have traffic accidents than people without.
Thought provoking. Are these behaviours that increase your chances of hanging out with the cats?
Regardless, the killing tigers have now been replaced by the killing cars.
More disturbingly, there is emerging evidence that some of us might become schizophrenic or neurotic when infected. And now forms of brain cancer are also being linked to infections
How do you get toxoplasmosis?
Easy!
Touching or coming into contact with sand containing infected cat poo.
Eating uncooked, unwashed fruits or vegetables that have been contaminated by manure with infected cat poo.
Eating raw or undercooked meat that's contaminated.
And sometimes, very rarely, by being born with it (a woman who gets a toxoplasmosis infection while pregnant can pass the parasite on to her unborn child).
There is a belief by some that we humans are where we are today because of schizophrenia.
And because of dominant rule breaking people who have pushed the boundaries.
It is a sobering thought that our civilisation might be what it is because of a tiny parasite.
But you know what: looking at the modern world I think that perhaps we can live without this parasite
That the time has come for us to make our own way, brains unaltered, into the future.
So make sure that your children's sand pits are covered when they aren't playing in them.
Keep your cat away from the wildlife.
Do a good job of washing and preparing your food.
Wear gardening gloves.
Such simple steps to stay safe.
And remember, if you get hot under the collar while driving, and want to gun your car from one stop to the next, and those idiot cyclists who just slow you down and you get so tense at the stupidity of others...
Just remember it could be your inner parasite trying to introduce you to your modern tiger.
So take a deep breath, calm down.
Beware what lies in the sand beneath.
Wednesday, July 06, 2011
I don't understand the Australian IT business
The situation is so bad, apparently, that we need the visa rules changed to allow IT specialists into the country (this link is one example of the articles that flood our papers).
But at the same time, IT companies in Australia will hire only 1 in a 100 applicants!
If you have a shortage of skilled people, then you don't turn your nose up at applicants at this rate. Sorry. You are obviously spoiled for choice and being super, super selective in who you hire. So much so that you are wasting more time in filtering and selecting people than you should be.
This, by the way, is in a country that has as almost standard, a probation period. If the employer doesn't like you in the first few months of your employ then you are toast. No recriminations, no blame. It would be surely be more cost effective to hire people and then shed them if they don't work out?
Do employers really want to open the gates to allow in people who they then aren't going to hire? It makes no sense to me.
I'm guessing that the real reason that we want the visa restrictions relaxed is to drop salaries, in some warped supply/demand way... If true, what does that tell us?
Footnote, 29th August: Of the 1 in a 100 applicants hired, almost 50% aren't up to the job...
Friday, June 17, 2011
Be Prepared
Another month, another speech..
Be Prepared
It has been a long day. The seats on the train are all taken. So you stand, hanging on to a strap as the train hustles you home.
A girl near the end of the carriage unexpectedly jumps up, sobbing, and steps through the inter-leading door between the carriages.
You see her framed by the door window, standing on the exposed, shaking, platform that bridges the two carriages.
Suddenly she picks her leg up, swings herself up and over the guard rails, and falls from sight.
You, and the the people in the carriage that saw this are shocked. What has just happened? Did she really just jump – why was there no sound – are trains really that brutally massive?
All these thoughts race through your mind. But before you can work out what to do you see her head bobbing at the bottom of one of the inter-leading carriage windows.
Relief fills you, and everyone else who saw her vanish. She's alright: she's clinging to the carriage! But she is in a very dangerous spot.
You realise to your horror that all the other people on your carriage who saw this drama play out are now starting to look at their newspapers, to look out the side windows – doing anything they can to exit the stage on which they unintentionally find themselves.
What would you do if that were you in the carriage?
I believe that we must consciously choose to act in the day to day drama's that intersect our lives.
I also know that we choose how we are to act in the drama. Our chosen role can range from deliberate inaction to full participation.
On that train rattling through the night, with the girl clinging to its side, I felt powerless.
She was behaving irrationally: if I went near her what might the result might be? Would she jump – or would she pull me out into the void to be with her?
I couldn't leave her, and I feared getting too close to her? What could I do?
There was another path I could follow. I could contact the driver. Every door on the train has an emergency intercom that allows you to talk directly to the driver.
But the more people there are around an unfolding drama, the harder it is for us to take an action that is different from theirs.
We look to the others around us for leadership – and when none comes we use their lack of action to abrogate our responsibilities.
I ran from door to door on that carriage, desperately looking for an intercom. And found none!
The people on the train were now starting to look at me – I was becoming the focus of their attention – not the girl desperately clinging to the side of the train.
It was just surreally wrong - if that had been your daughter, wife, or best friend of clinging to the side of the train, would you have ignored her to instead watch the strange man who was now running from door to door? I think not.
Yet on that carriage everyone did nothing, complicit in a unison of inaction. And now by focusing on me, made me feel as though I was the one who was strange and different – and that I was in the wrong.
Just then the train slowed and stopped at a station. I escaped their attention by leaping out the train.
I ran up the platform, to the drivers window, knocked on it, and told him of the girl.
Baden Powell, founder of the scout movement, said: “Be prepared”.
By that he meant that you must prepare yourself "by previously thinking out and practicing how to act on any accident or emergency so that you are never taken by surprise".
Later, when I got back on my carriage, after the driver had navigated the girl to the safety of the station platform, I saw that there were indeed intercoms on the carriage: others, standing, had simply been leaning against them, hiding them with their bodies.
Now when I get onto a train I check for the intercoms, making sure I know exactly where to go if something happens.
That preparation has already paid off: just last week another girl collapsed on the train. Whilst an elderly women aided her, I, nervously, because no one else was doing anything, called the driver.
No less than 8 officials met us at Flinders Station and and tended to the girl.
That brave elderly women and I were not punished for stalling that train in rush hour – none of the officials even bothered with the two of us once they were attending to the girl.
We just slipped away with the crowd when we saw the girl responding to their ministrations.
Ratko Mladic has just been extradited to the Hague, to stand trial for the Srebrenica massacre.
A massacre in which over 8000 men died. It is the largest mass murder in Europe since the end of the world war two.
What could tie the terrible deeds of Ratko Mladic to us, who were in that carriage with a girl clinging to its side?
400 heavily armed and highly trained Dutch soldiers were stationed in Srebrenica when the massacre took place. Unbelievably, they turned their backs.
The two events are related by the people who stood by and did nothing.
Evil blossoms when watered by the apathy of those around it.
If we can learn act in the day to day drama's that intersect our lives, we will be more able to act when evil starts to take root.
So be prepared – roll play scenarios in your head, learn from how others have behaved in emergencies.
And remember to choose your role – and act, when you find yourself inadvertently thrust into a drama.